From ae8d3938592cfa2425c49fd319f9cf52aba4adea Mon Sep 17 00:00:00 2001
From: Werner Almesberger <werner@almesberger.net>
Date: Sun, 18 Jan 2015 20:57:09 -0300
Subject: [PATCH] test/bugs: add regression tests for p2d_no_intersect and
 angle_3 bugs

That's commits 84f9d3c3b4ebbc83f21e009cb4d666f1616288ec
and 7ca942d0e94b0a8f0b1fa8193a41f46047ef3c24
---
 poly2d/test/bugs | 40 ++++++++++++++++++++++++++++++++++++++++
 1 file changed, 40 insertions(+)
 create mode 100755 poly2d/test/bugs

diff --git a/poly2d/test/bugs b/poly2d/test/bugs
new file mode 100755
index 0000000..b614d61
--- /dev/null
+++ b/poly2d/test/bugs
@@ -0,0 +1,40 @@
+#!/bin/sh
+. ./Common
+
+###############################################################################
+
+tst "bug: p2d_no_intersect could wrap around and bite itself" <<EOF
+struct p2d *p = p2d_new();
+
+p2d_append(p, v2d_new(0, 0));
+p2d_append(p, v2d_new(1, 27.8058649225));
+p2d_append(p, v2d_new(1, 2));
+p2d_close(p);
+p2d_area(p, 3, 3);
+EOF
+
+expect <<EOF
+EOF
+
+#------------------------------------------------------------------------------
+
+tst "bug: collinear path segments tripped angle_3" <<EOF
+struct p2d *p = p2d_new();
+struct p2d *q;
+
+p2d_append(p, v2d_new(0, 0));
+p2d_append(p, v2d_new(1, 27.8058649225));
+p2d_append(p, v2d_new(1, 2.0947540869));
+p2d_append(p, v2d_new(1, 2));
+p2d_close(p);
+q = p2d_area(p, 3, 3);
+p2d_write_gnuplot_all(stdout, q);
+EOF
+
+# Not output since the polygon is too small. This did not cause the above bug
+# but just happened to be a property of the problem polygon.
+
+expect <<EOF
+EOF
+
+###############################################################################